\documentclass[12pt,letterpaper]{article}
\usepackage[margin=1in]{geometry}
\usepackage{booktabs}
\usepackage{setspace} \doublespacing
\usepackage{amsmath,amsfonts,amssymb}
%\usepackage{color}
%\usepackage{moreverb}
%\usepackage{mathptm} %or \usepackage{mathptmx}
%(still uses some CM fonts, must be in  Type1 form.)
%\usepackage{natbib}  %formats references
\usepackage{pgf}
\usepackage{tikz}
\usepackage{ifpdf}
\ifpdf %if using pdfLaTeX in PDF mode
  \usepackage[pdftex]{graphicx}
  \DeclareGraphicsExtensions{.pdf,.png,.mps}
\else %if using LaTeX or pdfLaTeX in DVI mode
  \usepackage{graphicx}
  \DeclareGraphicsExtensions{.eps,.bmp}
  \DeclareGraphicsRule{.emf}{bmp}{}{}% declare EMF filename extension
  \DeclareGraphicsRule{.png}{bmp}{}{}% declare PNG filename extension
\fi
\begin{document}

  \bibliographystyle{/mydocs/alan}
  \bibliography{/mydocs/alan1,/mydocs/alan}
\end{document} 
